hearing the news we felt very surprised这里为什么用hearing而不用hear?

hearing the news we felt very surprised这里为什么用hearing而不用hear? hearing the news,we felt very surprised. Hearing the news,they felt very excited Hearing the bad news ,he felt (u ) He felt surprised when hearing this news.这句是从句吗. Hearing the bad news,we f________ very sad ⒈We are very excited after hearing the e_____ news. Hearing this news,he felt surprised.这句可不可以调换位置啊.就是把Hearing t I FELT VERY ____WHEN HEARING THE ____NEWS People felt _____ on hearing the unexpected news. he felt sad after hearing the f____ news Hearing the news ,_____________________.